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To pay your bill online, log on to CreditOneBank.com. If you have not already registered for online banking, use the Click Here to Register button. To sign up, you need your credit card number, Social Security number, address and phone number. Return to the main page, and log in with your user name and password.

At this point, make a payment by entering your bank account and routing information. You can also schedule automatic payments each month, explains Credit One Bank. There is no cost for online payment with the use of a bank account. Funds are typically available four days after the payment is posted. As of 2015, Credit One also offers an Express Payment option for a $9.95 fee, which releases funds within one business day. With this option, you can pay with either a checking account or a debit card.

To make a payment by phone, call Credit One's customer service department on the company's toll-free number. Fees may apply for this method. You can also mail your payment to the designated postal address. Be sure to insert your bill or write your account number on the check.